Biden has come under much scrutiny in recent months over questions surrounding his health, which has led to critics questioning his fitness for office.

The top-tier 2020 candidate has also had to face questions over his actions when serving as vice president in the Obama administration, particularly about his son Hunter’s sitting on the board of Ukrainian gas company Burisma Holdings, being paid $83,000 a month – some say double that when you add in consulting fees – at the same time Joe was the point man for the Obama administration to lead an anti-corruption effort in Ukraine.

Biden’s “No Malarkey” tour is being hailed as the most intense campaign swing of his 2020 presidential bid, meant to kick the campaign into gear to gain support in Iowa, which has polls showing him trailing Senator Bernie Sanders (I-VT), Massachusetts Senator Elizabeth Warren (D-MA) and South Bend, Indiana, Mayor Pete Buttigieg.